title: Changes of serum omentin levels and relationship between omentin and adiponectin concentrations in type 2 diabetes mellitus.
abstract: BACKGROUND
  Omentin has recently been characterized as a potent insulin-sensitizing adipokine, but its pathophysiologic roles in humans remain largely unknown.
  
  
  OBJECTIVE
  To investigate the change of fasting serum omentin levels and evaluate the relationship of omentin with adiponectin in patients with type 2 diabetes mellitus.
  
  
  METHODS
  35 patients with newly diagnosed type 2 diabetes (T2DM), 35 patients with impaired glucose regulation (IGT) and 35 patients with normal glucose tolerance (NGT) participated in this study. Fasting serum omentin and adiponectin levels were measured by enzyme-linked immunosorbent assay. The relationship between serum omentin, serum adiponectin levels and metabolic parameters was also analyzed.
  
  
  RESULTS
  Fasting serum omentin levels were significantly lower in T2DM and IGT groups than in NGT group (16.75±1.71 vs. 18.62±1.22 vs. 24.60±1.43 ng/ml, all P<0.01). Obesity subjects had significantly lower serum omentin levels than normal body weight subjects ( P<0.01 or P<0.05). Female subjects had moderately higher fasting serum omentin levels than male subjects. Fasting serum adiponectin levels showed a similar variation trend to omentin in T2DM and NGT groups, obesity and normal body weight subjects, female and male subjects. Fasting serum omentin levels were negatively correlated with HOMA-IR and positively correlated with adiponectin. Moreover, HOMA-IR and adiponectin were the independently predictors of fasting serum omentin levels.
  
  
  CONCLUSIONS
  Serum omentin levels possibly play an important role in the pathogenesis of insulin resistance and diabetes. More importantly, there is such a close connection between serum omentin and adiponectin levels that regulation of omentin may be dependent on adiponectin.
authors.affiliation: Department of Endocrinology, Second Affiliated Hospital, Chongqing University of Medical Sciences, Chongqing, China.
authors.forename: P
authors.initials: P
authors.lastname: Yan
authors.forename: D
authors.initials: D
authors.lastname: Liu
authors.forename: M
authors.initials: M
authors.lastname: Long
authors.forename: Y
authors.initials: Y
authors.lastname: Ren
authors.forename: J
authors.initials: J
authors.lastname: Pang
authors.forename: R
authors.initials: R
authors.lastname: Li
mesh_terms: D052242:Adiponectin / Q000097:blood; D016207:Cytokines / Q000097:blood*; D003924:Diabetes Mellitus, Type 2 / Q000097:blood*; D005215:Fasting / Q000097:blood*; D005260:Female; D058851:GPI-Linked Proteins / Q000097:blood; D006801:Humans; D037102:Lectins / Q000097:blood*; D008297:Male; D008875:Middle Aged
chemical_list: C499918:ADIPOQ protein, human; D052242:Adiponectin; D016207:Cytokines; D058851:GPI-Linked Proteins; C432397:ITLN1 protein, human; D037102:Lectins